A: Endomitosis does not cause karyokinesis or cytokinesis.
R: In endomitosis, mitosis occurs within the nucleus.
A: Synaptonemal complex develops between two synapsed homologous chromosomes.
R: Mitosis cannot be completed without the synaptonemal complex.Options~
1. If both Assertion & Reason are true, and the reason is the correct explanation of the assertion.
2. If both Assertion & Reason are true, but the reason is not the correct explanation of the assertion.
3. If the Assertion is a true statement, but Reason is false.
4. If both Assertion and Reason are false statements.
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A: During anaphase-II, chromatids of a chromosome separate.
R: Centromere of a mitotic chromosome divides during anaphase.
A: Dictyotene stage occurs in females only.
R: Gametogenesis rests for a long period at the diplotene stage in females.
A: Each chromosome of bivalent attaches with two spindles in metaphase.
R: In metaphase, bivalents migrate towards the metaphasic plate.
A: G2-phase is a pre-mitotic phase.
R: Chromosomes undergo condensation in this phase.
A: Anaphase-I is the actual phase of reduction in the number of chromosomes.
R: Homologous chromosomes move to the opposite poles with both their chromatids.
A: Golgi bodies and ER disappear in early prophase.
R: Their reorganisation stage is anaphase.
A: The complete disintegration of the nuclear envelope marks the start of metaphase.
R: Chromosomes are distinct with two chromatids at this stage.
A: Chiasmata counting stage is diplotene.
R: Dissolution of the synaptonemal complex occurs except at the sites of cross overs.
26 videos|287 docs|64 tests
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26 videos|287 docs|64 tests
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